... difference-product || 差积 differences of utility || 效用差 different parity || 异奇偶性 ...
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differences of utility
效用差异
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Roll call votes were selected on the basis of their utility in revealing substantive differences on significant security policy issues.
CENTERFORSECURITYPOLICY: 2008 National Security Scorecard
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